163261643 has 8 divisors (see below), whose sum is σ = 164505600. Its totient is φ = 162022120.

The previous prime is 163261633. The next prime is 163261687. The reversal of 163261643 is 346162361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163261643 - 2²⁰ = 162213067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163261603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113696 + ... + 115122.

It is an arithmetic number, because the mean of its divisors is an integer number (20563200).

Almost surely, 2^163261643 is an apocalyptic number.

163261643 is a deficient number, since it is larger than the sum of its proper divisors (1243957).

163261643 is a wasteful number, since it uses less digits than its factorization.

163261643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217.

The product of its digits is 15552, while the sum is 32.

The square root of 163261643 is about 12777.3879568557. The cubic root of 163261643 is about 546.5476788835.

The spelling of 163261643 in words is "one hundred sixty-three million, two hundred sixty-one thousand, six hundred forty-three".